Jepson Interchange (more information)
Print edition is available from the University of California Press
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This page is based on the 1993 Jepson Manual.
Please see the Jepson eFlora for up-to-date information about California vascular plants. |
| Jepson Flora Project: Jepson Interchange |
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TREATMENT FROM THE JEPSON MANUAL |
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Jepson Interchange (more information) |
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©Copyright 1993 by the Regents of the University of California
Print edition is available from the University of California Press |
| The second edition of The Jepson Manual (2012) is available from the University of California Press | |
| See also the Jepson eFlora, which parallels the Second Edition |
Tree or shrub, monoecious, evergreen
Stem: young crown conic; twig not grooved, resinous, generally persistent
Leaves simple, generally alternate, sometimes in bundles or appearing ± 2-ranked, linear or awl-like; bases decurrent, sometimes woody, persistent several years
Pollen cone generally < 6 cm, not woody, deciduous
Seed cone generally woody; bracts, scales generally persistent; scale not peltate, fused to or free from subtending bract
Seeds 2, on upper side of scale base
Genera in family: 10 genera, 193 species: mostly n hemisphere; many of great commercial value, supplying > half of world's timber
Reference: [Price 1989 J Arnold Arbor 70:247–305]
Stem: young bark smooth, with resin blisters, mature bark generally thick, deeply furrowed; young branches appearing whorled; twig glabrous or hairy; leaf scars smooth, round, flush with surface; bud generally ± spheric, generally < 1 cm, ± resinous
Leaves 2–9 cm, sessile, twisted at base to become 2-ranked, often curved upward on upper twigs, generally ± flat; upper surface with 2 longitudinal, whitish bands, midrib sometimes depressed; lower surface with or without whitish bands, midrib sometimes ridge-like
Seed cone erect, < 23 cm, maturing 1st season; stalk generally 0; bracts, scales deciduous; bract included or exserted, free from scale; axis persistent on stem
Seed with obvious resin deposits on surface; wing < 2.5 cm
Chromosomes: 2n=24 for all reports
Species in genus: 39 species: n hemisphere
Etymology: (Latin: silver fir)
Reference: [Vasek 1985 Madroño 32:65–77]
| Native |
Stem: trunk < 73 m, < 1.6 m wide; mature crown rounded, with large branches; young bark white-gray, mature bark red-brown, thin; twig hairy; bud resinous
Leaves 2-ranked, < 5 cm, alternating shorter and longer on each side, shorter toward twig tip; upper surface ± flat, without whitish bands; tip notched or blunt
Seed cone 8–15 cm; stalk < 5 mm; bract included
Ecology: Redwood, Douglas-fir, mixed-evergreen forests
Elevation: < 700 m.
Bioregional distribution: North Coast, Klamath Ranges (Seiad Valley), North Coast Ranges
Distribution outside California: to British Columbia, MontanaHorticultural information: DRN : 4, 5, 6 &IRR: 2, 3, 7, 15, 16, 17, 24 &SHD: 14, 18, 19, 20, 21, 22, 23.
| YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps). |
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